251 | Add to Reading ListSource URL: www.geo.cornell.eduLanguage: English - Date: 2003-01-29 19:34:35
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252 | Add to Reading ListSource URL: www.env.gov.nl.caLanguage: English - Date: 2010-05-13 12:54:57
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253 | Add to Reading ListSource URL: www.geofys.uu.seLanguage: English - Date: 2004-06-23 06:05:58
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254 | Add to Reading ListSource URL: www.dot.state.mn.usLanguage: English - Date: 2008-05-30 11:44:01
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255 | Add to Reading ListSource URL: www.dnr.state.oh.usLanguage: English - Date: 2005-04-07 10:26:10
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256 | Add to Reading ListSource URL: conservancy.umn.eduLanguage: English - Date: 2010-09-18 06:03:31
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257 | Add to Reading ListSource URL: www.bgs.ac.ukLanguage: English - Date: 2007-05-17 04:55:48
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258 | Add to Reading ListSource URL: rogov.zwz.ruLanguage: English - Date: 2009-05-22 16:58:25
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259 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-07-06 12:29:19
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260 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-11-01 11:34:40
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